I rather like working with wood so instead of hoops, I made a wooden modular design out of local douglas fir. It was'nt as difficult as it looks. This is its third season and it has stood up to the very strong winds winds that we have - up to 140 km/h this year, but attention!! doors closed when it blows.
each of the 12 arches was in three pieces assembled on the bench in my workshop using pocket hole screws and exterior glue. The uprights are screwed to bits of mild steel from the scrap yard hammered into the ground.